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Retired A Stars and Their Companions. VII. 18 New Jovian Planets

Johnson, John Asher and Clanton, Christian and Howard, Andrew W. and Bowler, Brendan P. and Henry, Gregory W. and Marcy, Geoffrey W. and Crepp, Justin R. and Endl, Michael and Cochran, William D. and MacQueen, Phillip J. and Wright, Jason T. and Isaacson, Howard (2011) Retired A Stars and Their Companions. VII. 18 New Jovian Planets. Astrophysical Journal Supplement Series, 197 (2). p. 26. ISSN 0067-0049.

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We report the detection of 18 Jovian planets discovered as part of our Doppler survey of subgiant stars at Keck Observatory, with follow-up Doppler and photometric observations made at McDonald and Fairborn Observatories, respectively. The host stars have masses 0.927 ≤ M_*/M_☉ ≤ 1.95, radii 2.5 ≤ R_*/R_☉ ≤ 8.7, and metallicities –0.46 ≤ [Fe/H] ≤+0.30. The planets have minimum masses 0.9 M_Jup ≤ M_P sin i ≲ 13 M_Jup and semimajor axes a ≥ 0.76 AU. These detections represent a 50% increase in the number of planets known to orbit stars more massive than 1.5 M_☉ and provide valuable additional information about the properties of planets around stars more massive than the Sun.

Item Type:Article
Related URLs:
URLURL TypeDescription
Johnson, John Asher0000-0001-9808-7172
Howard, Andrew W.0000-0001-8638-0320
Bowler, Brendan P.0000-0003-2649-2288
Henry, Gregory W.0000-0003-4155-8513
Marcy, Geoffrey W.0000-0002-2909-0113
Crepp, Justin R.0000-0003-0800-0593
Endl, Michael0000-0002-7714-6310
Cochran, William D.0000-0001-9662-3496
Wright, Jason T.0000-0001-6160-5888
Isaacson, Howard0000-0002-0531-1073
Additional Information:© 2011 American Astronomical Society. Received 2011 May 10; accepted 2011 September 26; published 2011 November 29. Based on observations obtained at the W. M. Keck Observatory and with the Hobby-Ebberly Telescope at the McDonald Observatory. Keck is operated jointly by the University of California and the California Institute of Technology. Keck time has been granted by Caltech, the University of Hawaii, NASA, and the University of California. We thank the many observers who contributed to the observations reported here. We gratefully acknowledge the efforts and dedication of the Keck Observatory staff, especially Grant Hill, Scott Dahm, and Hien Tran for their support of HIRES and Greg Wirth for support of remote observing. We are also grateful to the time assignment committees of NASA, NOAO, Caltech, and the University of California for their generous allocations of observing time. J.A.J. thanks the NSF Astronomy and Astrophysics Postdoctoral Fellowship program for support in the years leading to the completion of this work and acknowledges support from NSF grant AST-0702821 and the NASA Exoplanets Science Institute (NExScI). G.W.M. acknowledges NASA grant NNX06AH52G. J.T.W. was partially supported by funding from the Center for Exoplanets and Habitable Worlds. The Center for Exoplanets and Habitable Worlds is supported by the Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant Consortium. G.W.H. acknowledges support from NASA, NSF, Tennessee State University, and the State of Tennessee through its Centers of Excellence program. Finally, the authors wish to extend special thanks to those of Hawaiian ancestry on whose sacred mountain of Mauna Kea we are privileged to be guests. Without their generous hospitality, the Keck observations presented herein would not have been possible.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
NSF Astronomy and Astrophysics FellowshipUNSPECIFIED
Center for Exoplanets and Habitable WorldsUNSPECIFIED
Tennessee State UniversityUNSPECIFIED
State of Tennessee Centers of Excellence programUNSPECIFIED
Subject Keywords:binaries: spectroscopic; planetary systems; techniques: photometric; techniques: radial velocities
Issue or Number:2
Record Number:CaltechAUTHORS:20120120-151942870
Persistent URL:
Official Citation:Retired A Stars and Their Companions. VII. 18 New Jovian Planets John Asher Johnson et al. 2011 ApJS 197 26
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28897
Deposited By: Jason Perez
Deposited On:24 Jan 2012 15:33
Last Modified:09 Mar 2020 13:18

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